Practical Guide to Cryogenic Equipment for Laboratories and Fertility Clinics

Cryogenic equipment is one of those categories where the gap between what a purchasing decision looks like on paper and what it means in practice is unusually wide. A dewar is not just a container. A cryogenic freezer is not just a cold box. The specifications that look similar across competing products can produce meaningfully different outcomes in a working laboratory. This guide covers the essentials.

What cryogenic equipment actually is

Cryogenic equipment encompasses any device designed to produce, store, transport, or apply materials at temperatures below -150°C. In IVF and biological research, this means equipment using liquid nitrogen at -196°C to preserve embryos, oocytes, sperm, stem cells, and tissue samples.

The defining characteristic is passive, power-free temperature maintenance. Vacuum insulation eliminates heat transfer through conduction and convection. A reflective inner surface handles radiant heat. The result is a vessel that holds -196°C for weeks or months without any energy input.

Cryogenic freezers vs ULT mechanical freezers

A ULT mechanical freezer reaches -80°C. The biological preservation threshold is -130°C. That 50°C gap is why a ULT freezer cannot substitute for a cryogenic vessel in long-term embryo and oocyte storage. A cryogenic freezer at -196°C provides a 66°C buffer below the preservation threshold, covers power outages without risk, and has no compressor to fail.

What to look for in a cryogenic tank

Evaporation rate is the most important and most consistently underweighted specification. It determines how long samples remain protected between LN2 top-ups and what buffer exists if supply is disrupted. Request the published figure in litres per day before purchasing.

Neck diameter balances LN2 loss and access ergonomics. Narrow necks lose less LN2 but restrict access. Wide necks improve workflow but increase evaporation.

Vapour phase configuration eliminates cross-contamination risk through the liquid medium and is increasingly preferred in regulated fertility programmes.

Vacuum integrity must be checked regularly. Frost or condensation on the outer shell and elevated evaporation rate both indicate vacuum failure and require immediate removal from service.

The global market

The global cryogenic equipment market was USD 26.5 billion in 2025, growing at 7% CAGR to USD 45.4 billion by 2033. Tanks dominate the product segment. Storage dominates the application segment. The nitrogen cryogenic equipment category is growing from USD 4.14 billion in 2025 to USD 6.20 billion by 2030, driven by healthcare, IVF expansion, and biobanking globally.

Cryolab supplies cryogenic storage vessels, dry shippers, vitrification kits, cryogenic canes, safety wear, and laboratory consumables. 40+ years experience. ISO 9001:2015. cryolab.co.uk